/**
* @file SurfaceView.h
* A View that implements a CoreSurface buffer
* The buffer is created automatically in initWithFrame: with the size
* passed to it and 5-6-5 RGB format.
* The memory can be accessed with the pixels property, and after modifying
* it you must call setNeedsDisplay on it for it to update.
*/
#import <UIKit/UIKit.h>
#import <CoreSurface/CoreSurface.h>
@interface SurfaceView : UIView
{
CALayer *surfaceLayer;
unsigned short *pixels;
CoreSurfaceBufferRef surfaceBuffer;
}
@property (nonatomic, readonly) unsigned short *pixels;
@end
/**
* @file SurfaceView.m
* Implementation of SurfaceView
*/
#import "SurfaceView.h"
@implementation SurfaceView
- (id)initWithFrame:(CGRect)frame {
frame.origin.x /= 2;
frame.origin.y /= 2;
if (self = [super initWithFrame:frame]) {
// Create Surface
int w = frame.size.width, h = frame.size.height;
surfaceBuffer = CoreSurfaceBufferCreate((CFDictionaryRef)[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:w], kCoreSurfaceBufferWidth,
[NSNumber numberWithInt:h], kCoreSurfaceBufferHeight,
[NSNumber numberWithInt:'L565'], kCoreSurfaceBufferPixelFormat,
[NSNumber numberWithInt:2*w*h], kCoreSurfaceBufferAllocSize,
[NSNumber numberWithBool:YES], kCoreSurfaceBufferGlobal,
[NSNumber numberWithInt:2*w], kCoreSurfaceBufferPitch,
@"PurpleGFXMem", kCoreSurfaceBufferMemoryRegion,
nil]);
// Create layer for surface
CGRect frame2 = CGRectMake(frame.origin.x, frame.origin.y,
frame.size.width+1, frame.size.height+1);
CoreSurfaceBufferLock(surfaceBuffer, 3);
surfaceLayer = [[CALayer layer] retain];
[surfaceLayer setMagnificationFilter:0];
[surfaceLayer setEdgeAntialiasingMask:0];
[surfaceLayer setFrame:frame2];
[surfaceLayer setContents:surfaceBuffer];
[surfaceLayer setOpaque:YES];
[[self _layer] addSublayer:surfaceLayer];
CoreSurfaceBufferUnlock(surfaceBuffer);
// Get base address
pixels = CoreSurfaceBufferGetBaseAddress(surfaceBuffer);
}
return self;
}
- (void)dealloc {
[surfaceLayer release];
[super dealloc];
}
- (void)drawRect:(CGRect)rect {
// It will break if you remove this empty function
}
- (unsigned short*)pixels {
return pixels;
}
@end
/**
* @file SurfaceView.h
* A View that implements a CoreSurface buffer
* The buffer is created automatically in initWithFrame: with the size
* passed to it and 5-6-5 RGB format.
* The memory can be accessed with the pixels property, and after modifying
* it you must call setNeedsDisplay on it for it to update.
*/
#import <UIKit/UIKit.h>
#import <CoreSurface/CoreSurface.h>
@interface SurfaceView : UIView
{
CALayer *surfaceLayer;
unsigned short *pixels;
CoreSurfaceBufferRef surfaceBuffer;
}
@property (nonatomic, readonly) unsigned short *pixels;
@end
/**
* @file SurfaceView.m
* Implementation of SurfaceView
*/
#import "SurfaceView.h"
@implementation SurfaceView
- (id)initWithFrame:(CGRect)frame {
frame.origin.x /= 2;
frame.origin.y /= 2;
if (self = [super initWithFrame:frame]) {
// Create Surface
int w = frame.size.width, h = frame.size.height;
surfaceBuffer = CoreSurfaceBufferCreate((CFDictionaryRef)[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:w], kCoreSurfaceBufferWidth,
[NSNumber numberWithInt:h], kCoreSurfaceBufferHeight,
[NSNumber numberWithInt:'L565'], kCoreSurfaceBufferPixelFormat,
[NSNumber numberWithInt:2*w*h], kCoreSurfaceBufferAllocSize,
[NSNumber numberWithBool:YES], kCoreSurfaceBufferGlobal,
[NSNumber numberWithInt:2*w], kCoreSurfaceBufferPitch,
@"PurpleGFXMem", kCoreSurfaceBufferMemoryRegion,
nil]);
// Create layer for surface
CGRect frame2 = CGRectMake(frame.origin.x, frame.origin.y,
frame.size.width+1, frame.size.height+1);
CoreSurfaceBufferLock(surfaceBuffer, 3);
surfaceLayer = [[CALayer layer] retain];
[surfaceLayer setMagnificationFilter:0];
[surfaceLayer setEdgeAntialiasingMask:0];
[surfaceLayer setFrame:frame2];
[surfaceLayer setContents:surfaceBuffer];
[surfaceLayer setOpaque:YES];
[[self _layer] addSublayer:surfaceLayer];
CoreSurfaceBufferUnlock(surfaceBuffer);
// Get base address
pixels = CoreSurfaceBufferGetBaseAddress(surfaceBuffer);
}
return self;
}
- (void)dealloc {
[surfaceLayer release];
[super dealloc];
}
- (void)drawRect:(CGRect)rect {
// It will break if you remove this empty function
}
- (unsigned short*)pixels {
return pixels;
}
@end
